Malicious PDF — malware analysis report

Static analysis result for SHA-256 e16699531513b586…

MALICIOUS

PDF

49.9 KB Created: 2020-08-22 11:49:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98335409db425c8ddb44d2483b8a3876 SHA-1: 8dd6c5ec54f785616ba842ba5bba5f403f3f9cfd SHA-256: e16699531513b58645949fa9a4c3b57c3cd858f30bedf4a1834be0206956c401
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=best+astrology+software+in+tamil+free'. This URL is likely part of a phishing or scam campaign designed to redirect users to malicious content. The document also contains a large number of embedded links, many hosted on Shopify, which is flagged as a PDF link farm. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=best+astrology+software+in+tamil+free
    • http://ruxigo.pmsmachinery.us/uploads/1/3/0/7/130739227/lisogekaguw_tijivuvugun_dazoxakavimaz_zilizadofevenil.pdf
    • http://tufokus.nathanddavis.com/uploads/1/3/2/7/132712615/9825107.pdf
    • https://cdn.shopify.com/s/files/1/0435/9746/3714/files/20543280399.pdf
    • https://cdn.shopify.com/s/files/1/0427/5470/3526/files/nofolozidotizijo.pdf
    • https://cdn.shopify.com/s/files/1/0437/0336/9878/files/google_html_to_api.pdf
    • https://cdn.shopify.com/s/files/1/0448/0122/8951/files/88182692262.pdf
    • https://cdn.shopify.com/s/files/1/0434/0324/7781/files/tagovarukobamojeg.pdf
    • https://cdn.shopify.com/s/files/1/0434/5305/5128/files/tumaczenie_zda_angielski.pdf
    • https://cdn.shopify.com/s/files/1/0437/1605/1096/files/helping_and_linking_verbs_worksheet_4th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0427/4028/5607/files/quotations_from_chairman_mao_tse_tung.pdf
    • https://cdn.shopify.com/s/files/1/0434/7333/8533/files/top_answers_in_an_interview.pdf
    • https://cdn.shopify.com/s/files/1/0433/8463/5544/files/67874951168.pdf
    • https://cdn.shopify.com/s/files/1/0433/7595/2030/files/588540539.pdf
    • https://cdn.shopify.com/s/files/1/0434/8228/4194/files/28227094746.pdf
    • https://cdn.shopify.com/s/files/1/0439/9942/8766/files/2019_construction_company_profile.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006311.bin
6fae1ef6ecba8ad77daf613fbb2e412f6031c774f50c7cb329a45f5c1f643f23
pdf-font-stream PDF embedded font (sfnt) at offset 0x6311 5328 bytes
font_01_sfnt_off0000752d.bin
148388f0f4f2dcb04172db08f7d1f952da016c6e9e7a78ad4ffa63bfffe27651
pdf-font-stream PDF embedded font (sfnt) at offset 0x752D 2896 bytes
font_02_sfnt_off00008157.bin
91d123170cbdcb474c874b046cb3f5c8490f85ad57819a7c326a5913123a11ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x8157 10396 bytes
font_03_sfnt_off0000a4f5.bin
ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073
pdf-font-stream PDF embedded font (sfnt) at offset 0xA4F5 16092 bytes